King SPR375-24-300 3.75" Coilover Spring 24" Free Length 300 lb/in Rate

The King SPR375-24-300 is a heavy-duty coilover coil spring built specifically for demanding off-road and racing suspension applications. Featuring a 3.75" inside diameter, 24" free length, and a 300 lb/in spring rate, this spring is engineered to pair with 3.0" outside diameter coilover shocks.

Key Features:

• Spring Rate: 300 lbs per inch — linear rate for predictable, consistent response
• Inside Diameter: 3.75" — designed to fit 3.0" OD coilover shocks
• Free Length: 24"
• Material: High tensile, chrome silicon wire for maximum strength and durability
• Ends: Closed and ground flat for true, stable deflection and proper shock seating
• Finish: Powder coated for corrosion resistance
• Application: Purpose-wound for off-road use — not repurposed automotive springs
• Made in the USA

King coil springs are developed through extensive real-world testing across all terrain types, with race-proven designs validated in events from Baja to Dakar. Each spring is backed by a lifetime warranty against sagging and breakage for the original purchaser.